Mortgage fraud investigators with the Colorado Attorney General’s office have gathered documents filed with at least four county public trustees’ offices by some of the state’s largest foreclosure law firms, according to several people familiar with the request.

Trustees in four counties confirmed they each provided hundreds of pages of documents — mostly bid and cure statements associated with foreclosures spanning a five-year period — in response to a request by the attorney general’s consumer protection division.

Deputy Attorney General Jan Zavislan, who heads that office’s consumer protection division, declined to comment about the scope or nature of the request, or even to say it was an inquiry or formal investigation.